/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/Widgets/SNiagaraHierarchy.h
bool OnCanAcceptDrop ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FDragDropOperation](API\Runtime\SlateCore\Input\FDragDropOperation) > DragDropOperation, EItemDropZone ItemDropZone ) const